Juxius nagel



Nr'rnn STATES ATENT (Ethics.

J UK IUS NAG-EL, OF VIENNA, AlffTR-lA-lllINGAltY.

FIRE-PROOF SHEET.

SPECIFICATION forming part of Letters Patent No. 292,037, dated January 15, 1884.

Application filed June 16, 158i To all whom it may concern.-

Be it known that I, J UNIUS NAGEL, of Vienna, Austria-Hungary, have invented a new and useful Improvement in Fire-Proof Sheets, of which the following is a full, clear, and exact description. v

The object of this invention is to provide plates or sheets adapted to resist heat, fire, steam, or water, which sheets or plates are to be used as curtains, scenes for theaters, and for covering roofs or other objects which are to be protected from the effects ofheat, fire, rain or other atmospheric influences.

Reference is to be had to the accompanying drawings, forming apart of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure .l. is a face view of my improved sheets, parts being broken out. Fig. 2 is a cross-sectional elevation on the line wx,Fig.1.

The improved sheets or plates consist of one or more layers, A, of wire-netting or wirecloth,on which a fire-proofmass,]3,is applied,

in a manner that will be set forth hereinafter.

The fire-proof mass consists either of a mixture of asbestus with a zinc oxide, asbestus with magnesia, or asbestus with lime, or mi xture of all these substances in different proportions, according to the use to be made of the sheets. All these mixtures are saturated with a solution of sulphate of alumina, or a solution of a chloride of some metal, or with a mixture of these solutions, either after the said compound or mixture has been applied 011 the wire netting or cloth or while it is being applied.

The'above-mentioned mixture may be applied on the wire cloth or netting, either wet or dry, by hand or by mechanical means. After the mixture has been applied on the wire cloth or netting, the netting thus treated is passed between rollers, which press the mass or mixture between the meshes of the netting. Fibrous gypsum, graphite, alumina, silicates, whiting, metal oxides, chalk, baryta, mountain leather, or other like amphiboles or hornblendes, mineral wool, glass wool, or any other suitable filling substances may be added to the above-mentioned mixture of asbestus and other ingredients. However, the principal ingredients will always be asbestus with (Sperimrnsn one of the three above mentioned substances-- that is, oxide of zinc, magnesia, or lime, or mixture of these and a metatehloride or sulphate-of-alumina solution. Netting or cloth made of iron wire is best adaptedior receiving and holding the mixture, and should have from six to thirty meshes per inch, according to the use to be made of the plates or sheets.

If the above-described plates are to be used for covering walls-that is, if they are to be glued over the plastering or studding-they can be made plain, white, or colored, or designs can be printed on the sheets in the same manner as designs are printed on sheets of paper for wall-papering. If desired, they can also be provided with a coating of glue on one side. If the sheets are to be used for covering rools, graphite is added to give the sheets a darker color, and considerable more oxide of zinc is added for thepurpose of making the plates stiffer. If the plates or sheets are to housed in the interior of a building, the materials are mixed in about the following proportions: nsbcstus, one hundred parts, by weight; oxide of zinc two hundred parts, by weight; whereas if the plates are to be used for covering roofs-that is, on the exterior of the buildingthe proportions are about as follows: asbestus, one hundred parts; oxide of zinc, three hundred parts; but the proportions can be varied very much, according to the use to be made of the sheets. As a rule, not less than seventy five parts and not more than four hundred parts of zinc oxide, magnesia, lime, or mixture of these ingredients should be mixed with every one hundred parts, by weight, of asbcstus.

I will now give a dctai led description of the manufacture of the sheets or plates, but wish to state that in place of the zinc oxide any other of the above-mentioned analogous ingredients can be used, and in place of the solution of chloride of zinc :l'or impregnating, any other solution of a metal chloride, or a sulphate of alumina, or mixture of the same, can be used. The asbcstus is disintegrated in some suitable manner, and is then mixed dry with the oxide ol'zinc in some suitable mixing apparatus. This mixture is then applied on both sides of the wire netting or cloth, which is then passed through rollers, whereby the mixture will be pressed in the meshes of the wire netting or cloth, and the sheets will have the appearance of pasteboard. At the same time that the sheets or plates are passed between the rollers they are saturated with a chloride-of-zine solution of about from 40 to 50 Baum. This can be accomplished best by passing a series of belts through the solution and over the rollers, so that the solution 3 will be conveyed by the said belts to the sheets as the same are passing through the rollers. The sheets are then washed or soaked to deprive them of the superfluous chloride of zinc. Those plates which are to be highly 5 water-proof are not washed or soaked, but are saturated or treated with a solution of soap, or with other fatty substances, and, if necessary,aresaturated with a solution of sulphate of alumina,wherebyinsoluble sebaeic alumina :0 is formed. If it is desired that these plates shall have very smooth surfaces, powdered glass or any other flux is added to the mixture, and theplates are then exposed to a very high temperature. If the hardening is to take place very slowly, bora'te salts are added to the mixture.

In. place of wire-netting, any other suitable fabric or webbing may be used..

I do. not abandon or dedicate to the public 0 any patentable features set forth herein and nothereinafter claimed, but reserve the right to claim the same either in a reissue of any patent that may be granted uponthis application or in other applications for Letters Patent that I may make.

Having thus fully described my invention,

I claim as new and desire to secure by Letters Patent- 1.. As an improved article of manufacture, fire-proof plates or sheets made substantially 0 as herein shown and described, and consisting of wire cloth or netting or other fabric on which a mixture of asbestus and oxide of zinc, magnesia, lime, or analogous substances is applied, which mixture is saturated with a solution of sulphate of alumina or metal chloride, as set forth.

2. The herein-described method of making fire-proof sheets or plates, consisting of ap- I plying a mixtureof asbestus and oxide of zinc, 5o magnesia, or lime on wire netting or cloth, then pressing the said mixture into the meshes of the netting or fabric, and then saturating the fabric with a solution of sulphate of alumina or a metal-chloride solution, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

J UNIUS NAGEL.

\Vitnesses:

WILLIAM HUNING, .lA MES RILEY \VEA v 1m.

Patent No. 292,037.

It'is hereby certified that Letters Patent No. 292,037, granted January 15, 1 upon the application of Jnnius Nagel, of Vienna, Austria-Hungary, for an irnpr ment in Fire-Proof Sheets, should havecontained the following clause, setting f certain foreign patents which had been obtained by the said J uniu's Nagel, viz: I

Subject to thelimitation prescribed by Section 4887' of the Revised Statutes reason'of Belgian Patent No. 62,686, datedSeptember 24,1883. and Italian Pa XVII 15,904 and XXXI393, dated September 26, 1883.

' It is further certified that the United States Letters Patent No. 292,037 shoul read with this clause inserted 'in the grant thereof, thereby limiting its term, am

make it conform to the files and records pertaining to the casein the Patent Oflice.

Signed. eountersigned, and sealed this 15th day of April, A. 13. 1884. [SEALJ r 7' M. L. JOSLYN,

Acting Secretary of the rm C(nmtersigned: I

BENJ. BUTTERWORTH,

Commissioner of Patents; 

